Back-pedaling coaster-brake.



P. S. ELLETT. BACK PEDALING GOASTER BRAKE. APPLICATION FILED APR. 30.1908.

Patented Jan. 5, 1909.

FIGZ.

HNVENTOR: w w 6. ea

/ l-:a rfli mzz WITNESSES:

' hub e, and is held ball race bearing diametral shoulder 14 on Arri P1P? its :i rh it EET the FR-EDERIGK b. ELLETT, OF ELl-IIRA, NEW YORK, ASSIGNOR TO EGLKPSE MACHINE OOIiiPJ'iNY, OF ELMIRA, NEW YORK.

V BAQK-IEDALING fiOAS'IEB-IBRAKE.

No. scenes.

#Specification of Letters Patent. Patented Zen. Iii-M9.

Application filed April 30, 1903. Serial No, i30,223.

of few parts that are made cheaply and opcrate plowerfully.

In t e drawings :-Figure 1 is a central, longitudinal section of the rear hub of a bicycle equipped with the device; Fi 2 is a side view with the hub cut away; an Figs. 3 to 5, inclusive, are side views of parts.

1' is a stationary axle adapted to be locked within the rear forks of the bicycle, and is represented as threaded at both ends2 and- A block 4 is screwed upon the end 2 of the axle, which affords a ball race 5 for the stationary by the brake other end ofgthe axle 1 a ball race bearingv for the 11, which in turn affords a 12 for that end of the hub.

The brake shell 7 is supported b a nonrotative, longitudinally movable s eeve 13. The sleeve is held against rotation b a connection with the stationary block 4 that perinits it to move longitudinally. In the construction shown this is accomplished by a the block 4 that enters corresponding recess 15 in the end of said sleeve 13. The brake shell 7 is also held against rotation, and in the construc tion shown this is effected by a diametral slot 16 that also receives the block 4.

-[he drawings show awedge 17 for expending the brake shell out against the hub, and this lies within a wedge shaped slot 18 in said brake shell,.and is supported by the sleeve 1:6. This wedge is of such size that normally, when the brake shell is contracted, it extends out beyond the latter, and by engaging a flange 1?) on the sleeve 13 holds the sleeve away from the stationary block, though the sleeve still l4 on the stationary block. Accordingly, when the sleeve 13 isrnoved longitudinally inwardly upon the stationary block 4, the wedge 17 is forced further into the slot 18 arm 8. On the block 9 afl'ords a driving sprocket the shoulder 14 on engages the shoulder in the brake shell 2'', ind expands latter out against the hub.

The longitudinally movable part 20 nects the driver with the brake. This upon the axle, and when moved in the d ea tion of the brake shell engages the flan e on the sleeve 13, forcing the latter in upon the wedge. The connector is rep: 3. as having, an extension 21 that ente tween the sleeve 13 and the axle. coming into contact with a retarder a is carried by the sleeve 13. The retarder shown is a spring that is attached to the sleeve 13 and projects down through a transverse slot 23.

Operative connection between the driving sprocket 11 and the connector is made by means'of a screw threaded sleeve 24. that is attached to the connector, and extends out to receive the sprocket. The connector is also utilized to effect driving connection between the sprocket and the hub, for that pur pose engagin a friction surface on the lat ter. -On pe aling forward (assuming that the driving sprocket and hub are not already in o erative connectionh the connector is retar ed by the slight pressureof the stationary s ring 22 upon its sleeve 21, so that the sproc (ct-11 turns upon the threaded sleeve 24 of the connector, and brings the connector proper,.20, into frictional contactwith the cone 25 on the hub. To coast, the feet are held stationary upon the pedals, when the connector will disengage the hub and move over to the brake mechanism. To operate the brake, the pedals are rotated backwardly, thereby forcing the connector in u on the sleeve 13, which in turn moves inwar ly upon the shoulder 14 on the stationary block 4, at the same time forcing the wed e 17 into the brake shell and expanding t e latter out agai st the hub.

What I ciir is:, 1. The c innation with a wheel hub and an anchored brake, of a driver for the hub and brake, normally disconnected from both; a longitudinally shiftable an outwardly-projecting sleeve ada ted to support the driver; and means where y rotation of said driver upon said sleeve serves to shift said connector longitudinally to connect operatively the driver with the brake; sub stantially as shown and'rlescribed,

- 2. The combination with a wheel hub and an anchoredbrake, of a driver for the hub :5 sinconnector, having means for insuring and brake. normally disconnected from;

both: a lon itu in'all r shiftable connector r D 3 for operatrvely connecting the driver nith the'hrske, having an outvardlyprojeeting,

screw-threaded sleeve, adapted to receive the driver; substantially as shown and described.

3. 'lhe combination vv ilh a heel huh and an anchored lill'itliC, of a driver for the hub and brake, normally disconnected from both; a longitudinally-sinftahle connector, having an outwardly-projecting sleeve adapted'to support the driver; means hereby rotation of said driver upon said sleeve serves to shift said connector longitudinally to connect 0peratively the driver ith the. brake; and the relative turning of the driver and connector; substantially shown and described.

4. The combination with a wheel hub and an anchored brake, of a driver for the hub and brake; a longitudinally-niovable connector, having an outwardl extending screw threaded sleeve adapted to receive the driver; means located at one side of said connector hereby engagement is made ith the hub, and on its opposite side whereby it actuates said brake; substantially as shown and CSCIlLCtl.

tor; substantially as 5; The combination with a vihcel hub and an anchored brake mechanism, including its support, of a driver for the hub and brake," a longitudinally-movable connector, having both an outwardly extending sleeve adapted to receive the driver, and. an inwardly extending sleeve adapted to engage retarding means carried by the brake mechanism; and means hereby rotation of the driver upon its said sleeve serves to shift said connect-or longitudinally to connect operatively the driver with the brake; substantiall asshmvn and describml.

6. In a coaster" brake mechanism, the corn bination with a rotary sprocket of a stationary brake incrhmiisrn adapted to be operated thereby, and having a transverse slot therethrough; a connector between the sprocket and brake, having a part that'is concentric with the latter, and extends beneath said slot," and a retardcr, last to said brake mechanism at one end, and extending down through it to engage yicldingly said connecshown and described. FREDERICK S. ELLETT. Witnesses:

I). L. W III'ITIER, A. 0. Rich. 

